Mode of



UNITED srnrns raras@ MARTIN BELL, OF ANTIS TOWNSHIP, I-IUNTINGDONCOUNTY, PENNSYLVANIA.

MODE OF .APPLYING THE WASTE HEAT 0F BLAST-FURNACES TO STEAM-BOILERS.

Specication of Letters Patent 1\T o. 1,630, dated June 10, 1840.

To all whom it may concern ABe it known that I, MARTIN BELL, of thetownship of Antis, in the county of Huntingdon and State ofPennsylvania, have invented an Improvement in the Management of the Heatof Blast-Furnaces, said improvement consisting in the manner of applyingthe waste heat of such furnaces to the generating of steam insteam-boilers, which steam may be applied to the working of any of theordinary blowing apparatus for supplying the blast of air to the furnaceor to other purposes; and I do hereby declare that the following is afull and eXact description thereof.

The only useful application of the large quantity of heat which escapesfrom the ordinary blast furnace, has been the employing it for thekheating of air to create what is known under the name of the hotblast. Iam aware .that it has been suggestedy also that this waste heat might beemployed for the generating of steam, and

the working of steam engines; but I do not` know or believe that thesame has been practically and successfully applied to this purpose untilthe same was done by me. The manner in which I have effected this isrepresented in the accompanying drawin s.

Iigure l, shows the general arrangement of my stack, or furnace, and ofthe steam ooilers to be heated thereby, with some of their appendages.Fig. 2 is across section of two of the boilers, and of the arches `ormasonry in which they are set. Fig. 3, is a longitudinal section of oneof the boilers, its flue, chimney, &c.; and Fig. 4, represents thearrangement at the'tunnel-head of the stack for the supply of fuel andthe management of the heat which is to be conducted therefrom under theboilers.

In the respective figures like parts are designated by the same lettersof reference.

A, A, is the furnace, or stack, built in any of the ordinary modes.

D, D, is a platform on a level or nearly so, with the top of the stack,and from which the furnace is supplied with fuel and the other materialsused. This platform in the drawing, is shown as though built of timber,but its construction will be governed by its location, in a manner wellunderstood bv iron-masters.

B,B, are the arches or masonry,in which is set the horizontal' boilersB, B-B, B.

la.. Y.

tending to the front c, whence it returns under the second boiler, andescapes through the chimney V. These flues are shown at H, H. Inaddition to the openings G, Gr, in the plates C, C, for the purpose ofclearing the flues, &c., I intend also to make openings through thebrick work at the sides, as R,

R,'with the same intention. In the middle' of the archforming thesetting of the boilers, I construct a pit or receptacle S, S, into whichthe ashes and other matter collected in the iues under the boilers ismade to fall by means of the scrapers, and into these pits I make anopening, as at U, for their removal, adapting to these openings closefitting doors or Stoppers; and I also adapt to them at their uppersides,sliding coversT, T. Under the chimneys V, V, there are alsoreceptacles J F ig. 3, for the deposition of ashes, &c., with therequisite provision for clearing the same when necessary. The chimney orchimneys V, V, must be of such height as to cause suflicient draft inthe flues. Upon the top of the tunnel there is a plate K of castiron,placed horizontally, and having a perforation in the center for thepassage of the heated air or flame, this plate having ledges cast uponit to receive the edges of the plates which it is to sustain, and whichform the flues which lead on either side to the boiler arches. Portionsof these plates are shown at L, L. The upper plate L', Fig. l, isperforated in the middle, to allow the draft to pass through it when notdirected through the lateral flues and under the boilers. This openingis to be provided with suitable covers. This part may be surmounted by achimney I), which is shown as resting on a rectangular base plate Q, Q,supportedby iron columns Q', Q, the lower ends of which rest upon thestack.

N, is a feed hole for admitting the fuel, &c., and this is closed by adoor O.

rIhere isnot any thing special in the part Y of the structure lastdescribed,`the plates'L,1

CII

merely forming a-portion of the iues at the vtop of the stack, whichextends laterally, so 'as t0 communicatewith those passing under the`boilers nearest to the stack, by which to conduct the heated air underthem when required. When so Vconducted the opening in the plate'L, Figs.l and 4, is to be closedv and the dampers which are used to open orV cutoff the communication through-the lues to the boilers are to'be raised.M, M, Figs.

' l and t, are the stems of `these dampers',

whichY cross the flues in the ordinary man'- ner, and which may beraised by Chains and .fectly similar in their arrangement, and that oneor both pairsmay be used, asmay be preferred. It 1s notnecessary, 1nfaet,to con:`

struct both, but itV will beadvanta'geous so to do, as in ease ofrepairing becoming" necessary, when one set 1s out of order, the othermay be used. v v

4Fenna., 14th March, 184015` AEIaving thusffully described thefmanner inwhichY I construct my flues and boilers for the purpose of employingthewastej` heat'from a blast-.furnace for the generating of steam, to beapplied to the working of ablowing apparatus, by which the furnaceitself may and can be blown and the necessary blast furnished therefor,and for other purposes, what I claim therein as constituting myinvention and discovery, and` which I desire tosecure by Letters Patent,is.-

The arrangement offlues and their necessary appendages as vhereinbeforehdescribedfbyl,

which I connect a `pair or pairs offboilers with a blast furnace,substantially fin! the.

manner set forth and described, thereby applying the flame and heatescaping out `1 of the` top of the furnaceto create a `steam `powerwhichmay 'beused to blow the `fur-` nace and which mayv` also ,beapplied to other purposes; and itis hereby declared` that I ido notintendncorpurposeto limit myself to the number ofbo1lers, or to theprecise form of' the respective parts, as `described andl delineated,but to vary these as I may thinkproper, while I attain'the same end bymeans substantially the same.` 1 Antis township, Huntingdon county,

Witnesses: .y WM.. P. ELLIOTT,

EDMUND MAHER.

. `MaRTIN BELL..V l

